indicators/Alligator.mq4

   1 //+------------------------------------------------------------------+\r
   2 //|                                                    Alligator.mq4 |\r
   3 //|                      Copyright © 2004, MetaQuotes Software Corp. |\r
   4 //|                                       http://www.metaquotes.net/ |\r
   5 //+------------------------------------------------------------------+\r
   6 #property copyright "Copyright © 2004, MetaQuotes Software Corp."\r
   7 #property link      "http://www.metaquotes.net/"\r
   8 \r
   9 #property indicator_chart_window\r
  10 #property indicator_buffers 3\r
  11 #property indicator_color1 Blue\r
  12 #property indicator_color2 Red\r
  13 #property indicator_color3 Lime\r
  14 //---- input parameters\r
  15 extern int JawsPeriod=13;\r
  16 extern int JawsShift=8;\r
  17 extern int TeethPeriod=8;\r
  18 extern int TeethShift=5;\r
  19 extern int LipsPeriod=5;\r
  20 extern int LipsShift=3;\r
  21 //---- indicator buffers\r
  22 double ExtBlueBuffer[];\r
  23 double ExtRedBuffer[];\r
  24 double ExtLimeBuffer[];\r
  25 \r
  26 //+------------------------------------------------------------------+\r
  27 //| Custom indicator initialization function                         |\r
  28 //+------------------------------------------------------------------+\r
  29 int init()\r
  30   {\r
  31 //---- line shifts when drawing\r
  32    SetIndexShift(0,JawsShift);\r
  33    SetIndexShift(1,TeethShift);\r
  34    SetIndexShift(2,LipsShift);\r
  35 //---- first positions skipped when drawing\r
  36    SetIndexDrawBegin(0,JawsShift+JawsPeriod);\r
  37    SetIndexDrawBegin(1,TeethShift+TeethPeriod);\r
  38    SetIndexDrawBegin(2,LipsShift+LipsPeriod);\r
  39 //---- 3 indicator buffers mapping\r
  40    SetIndexBuffer(0,ExtBlueBuffer);\r
  41    SetIndexBuffer(1,ExtRedBuffer);\r
  42    SetIndexBuffer(2,ExtLimeBuffer);\r
  43 //---- drawing settings\r
  44    SetIndexStyle(0,DRAW_LINE);\r
  45    SetIndexStyle(1,DRAW_LINE);\r
  46    SetIndexStyle(2,DRAW_LINE);\r
  47 //---- index labels\r
  48    SetIndexLabel(0,"Gator Jaws");\r
  49    SetIndexLabel(1,"Gator Teeth");\r
  50    SetIndexLabel(2,"Gator Lips");\r
  51 //---- initialization done\r
  52    return(0);\r
  53   }\r
  54 //+------------------------------------------------------------------+\r
  55 //| Bill Williams' Alligator                                         |\r
  56 //+------------------------------------------------------------------+\r
  57 int start()\r
  58   {\r
  59    int limit;\r
  60    int counted_bars=IndicatorCounted();\r
  61 //---- check for possible errors\r
  62    if(counted_bars<0) return(-1);\r
  63 //---- last counted bar will be recounted\r
  64    if(counted_bars>0) counted_bars--;\r
  65    limit=Bars-counted_bars;\r
  66 //---- main loop\r
  67    for(int i=0; i<limit; i++)\r
  68      {\r
  69       //---- ma_shift set to 0 because SetIndexShift called abowe\r
  70       ExtBlueBuffer[i]=iMA(NULL,0,JawsPeriod,0,MODE_SMMA,PRICE_MEDIAN,i);\r
  71       ExtRedBuffer[i]=iMA(NULL,0,TeethPeriod,0,MODE_SMMA,PRICE_MEDIAN,i);\r
  72       ExtLimeBuffer[i]=iMA(NULL,0,LipsPeriod,0,MODE_SMMA,PRICE_MEDIAN,i);\r
  73      }\r
  74 //---- done\r
  75    return(0);\r
  76   }\r
  77 //+------------------------------------------------------------------+\r
  78 \r